Dna isolated from water samples collected in six different sites was prepared and anaylized by gel eletrophoresis for the presense of carp. the resulting gel is shown. lane 1 through 6 contain the dna from each site. lane 7 and 8 represent the negative and positive controls. based on the bending patterns, how many sites tested positive for carp?

The sites tested positive for lane 3.

Lane 3 APEX

If lane 7 represent the negative control and 8 shows the positive controls (as we may infer by reading that lanes 7 and 8 represent negative and positive controls RESPECTIVELY) then we can say that lanes 1,3,5,6 and 8 tested positive for carp. 

✿━━━━@♥ℳg━━━━✿______________________________✿━━━━@♥ℳg━━━━✿Nuclear membrane

The nucleus is enclosed by a double layered cellular membrane called the nuclear membrane.

Nucleoplasm

The nucleus contains a nuclear sap, enclosed by the nuclear envelope, which is known as the nucleoplasm. This holds the nucleoli and suspends the chromatins.

Nucleolus

The nucleolus is a sub-organelle present inside the nucleus. It can be observed as a dark spot under the microscope.

Nucleoli are made up of proteins, ribosomal RNA (rRNA), and ribosomal DNA (rDNA).

Chromatin network

DNA gets associated with protein molecules to form chromatins.

Chromatins are present in the nucleoplasm.